Environment Canada has confirmed that a tornado touched down in New Tecumseth, Ont., where a roof was torn off a home, causing part of its upper floor to cave in Tuesday afternoon.

The agency said the tornado was likely was an EF-1, at the lower end of the scale, and will be inspecting the damage.

"The winds were between 135 and 175 kilometres per hour," said Dave Phills from Environment Canada.

The path of the tornado may have exceeded ten kilometres in length.

Ontario Provincial Police Const. Paul Nancekivell told CBC News that the storm brought down a handful of trees and power lines along the 15th Sideroad in New Tecumseth, which lies about 90 kilometres northwest of Toronto.